Thermodynamic analysis of geothermal energy systems with forced recovery from aquifers

by Se Kyoun Lee

Written in English
Published: Pages: 156 Downloads: 375
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Subjects:

  • Geothermal resources.,
  • Heat recovery.,
  • Groundwater.

Edition Notes

Statementby Se Kyoun Lee.
The Physical Object
Pagination[12], 156 leaves, bound :
Number of Pages156
ID Numbers
Open LibraryOL14240454M

  EU member states have concluded an agreement that renewable energy will cover 20% of the total energy production by To achieve this target, it is essential to investigate all possibilities for renewable energy production. We investigated whether groundwater could provide a shallow geothermal energy resource, and to what extent it could meet the demands for heating buildings in Cited by: Background and Motivation Background and Motivation Resource classification is a key element in the characterization, assessment and development of geothermal energy. Stakeholders at all levels of government, within the geothermal industry, and among the general public need to be able to use and. District heating (also known as heat networks or teleheating) is a system for distributing heat generated in a centralized location through a system of insulated pipes for residential and commercial heating requirements such as space heating and water heating. Energy Efficiency & Renewable Energy 2 Accelerate Near Term Hydrothermal Growth • Decrease exploration risks and costs. • Lower cost of electricity to 6 cents/kWh by • Development of 30 GWe of undiscovered resources. Secure the Future with Enhanced Geothermal.

geothermal water and then back to mixing of the geothermal water with the original groundwater involves quite complex thermodynamic calculations with assumptions about thermodynamic data and underground conditions. Some preliminary calculations have been carried out using water from Austaraselslindir (location No. 2) (Table 3) titrated with. Process for recovery of energy from geothermal fluids such as geothermal brine in a geothermal formation by injecting a water immiscible working fluid, preferably organic, typically a hydrocarbon, e.g. isobutane, into the geothermal formation containing a geothermal fluid such as hot brine, wherein the hydrocarbon working fluid is heated by direct heat exchange contact with the hot geothermal Cited by: Cerro Prieto geothermal reservoirs tend to exhibit good hydraulic communication with adjacent cool groundwater aquifers. Under natural state conditions the hot fluids mix with the surrounding colder waters along the margins of the geothermal system, or discharge to shallow levels by flowing up fault L. In response to exploitation reservoir pressures decrease, leading to changes in the fluid.   Energy storage is the capture of energy produced at one time for use at a later time. A device that stores energy is generally called an accumulator or comes in multiple forms including radiation, chemical, gravitational potential, electrical potential, electricity, elevated temperature, latent heat and storage involves converting energy from forms that are.

Geothermal energy is the energy stored in the form heat beneath the earth’s surface – of the radioactive isotopes of Uranium (U,U), Thorium (Th) and Potassium(K40) These earth s.. are concentrated in the crust and mantle. The other main source is the primordial energy of planetary accretion. The earth is cooling veryFile Size: 2MB. A RE-EVALUATION OF GEOPRESSURED- GEOTHERMAL AQUIFERS AS AN ENERGY RESOURCE A Thesis Submitted to the Graduate Faculty of the Louisiana State University and Agricultural and Mechanical College In partial fulfillment of the Requirements for the degree of Master of Science in Petroleum Engineering inCited by: Consequently such reservoirs contain considerable geothermal energy. This paper considers the possibility of recovery or such energy. In case when reservoir pressure maintained by means or peripherical waterflooding a simultaneous production of oil and hot water is possible with no loss for oil recovery. possible with no loss for oil recovery. The contributions of hydraulic (pressure) energy recovery and geothermal power production are also assessed. For deep injection into the producing formation, it is concluded that methane extraction processes are not applicable, insofar as maintenance of high surface pressures provides no clear-cut energy .

Thermodynamic analysis of geothermal energy systems with forced recovery from aquifers by Se Kyoun Lee Download PDF EPUB FB2

Even with a conservative recovery factor of 1% and an assumed lifetime of 30 years, the annual recoverable geothermal energy is in the same order as the world final energy consumption of EJ yr −1. Although the amount of geothermal energy stored in aquifers is vast, geothermal direct heat applications are currently underdeveloped with less than one thousandth of their technical potential Cited by: According to a report issued by MIT, large amounts of geothermal energy are stored in hot rocks at depths of km to km.

Large-scale utilization of geothermal energy may be a key technique to cope with the environmental problems resulting from using fossil fuels. Enhanced geothermal systems (EGS) have been designed to extract and Cited by: This paper will analyze a special energy conversion system of geothermal power generation with a flash system combined with binary cycle and suggests a mathematic model of thermodynamic calculation for such combined geothermal power plants in by: 2.

Ratlamwala et al. have performed a thermodynamic analysis to a new geothermal energy production process producing electricity, cooling, heating, hot water and hydrogen. According to their results, changing of geothermal source temperature from K to K increases daily hydrogen production from kg to by: Thermodynamic Analysis of Geothermal Binary Power System.

Basing on mid-low-temperature heat resource, a power system is developed using the characteristic of low boiling non-azeotropic ammonia-water mixtures. This system may produce power using low temperature heat resource. A novel heat recovery based energy system is proposed by Soltani et al.

[4]. A multigeneration energy system with one fuel intake (sawdust biomass fuel) and five useful outputs is proposed and.

Therefore, the energy, exergy and economic analysis of the proposed system shows that the geothermal source is a viable and environmentally sustainable solution to produce electrical and thermal. Another techno-economic analysis of low-grade geothermal energy for water desalination using MED has been conducted [].

It showed that lowgrade geothermal energy for thermal desalination. Large thermal extractions and extensive implementation of groundwater heat pumps (GWHP) necessitate a validation of the sustainability of their use and possible detrimental effects on groundwater. The goal of this work is to develop a regional heat transport model (of ~13 km × 5 km) for real site conditions.

This model should consider all relevant transport processes, despite the large Cited by:   Geothermal energy from hot sedimentary aquifers. To date, the most prominent alternative type of geothermal energy system is known as an Enhanced Geothermal System (EGS), which does not require hydrothermal resources.

Using highly specialized technology, EGS creates geothermal resources in hot dry rock through "hydraulic stimulation. Initial pressures in geopressured aquifers are usually more than 70 MPa. Salinity varies f toppm. The solubility of methane in brine varies from 4 to 9 sm 3 per sm 3 of brine for geopressured–geothermal by: 2.

A thermodynamic analysis of Caufourier's proposal for a hybrid fossil-geothermal power plant (described in ) is : Lucien Bronicki. In the twentieth century, high-temperature water resources have been used for the production of electricity, whereas medium and low temperature resources are used for domestic heating, from individual houses to whole communities, as well as for balneology, industrial, and agricultural purposes (Albu et al.

; Stober and Bucher ).The utilization of geothermal energy provides Cited by: 2. Throughout the past 30 years many resource type schemes and definitions were published, based on temperature and thermodynamic properties.

An alternative possibility to cataloging geothermal energy systems is by their geologic characteristics, referred to as geothermal plays. Applied to worldwide case studies, Cited by: THERMODYNAMIC ANALYSIS OF GEOTHERMAL ENERGY SYSTEMS WITH FORCED RECOVERY FROM AQUIFERS 1.

INTRODUCTION Background General A geothermal resource can be simply defined as a reservoir in the earth's crust from which thermal energy can be extracted economically and utilized for generating electric power or heating.

Nevertheless, it is also essential to investigate more than two flash stages for the given well pressures and temperatures to determine the options providing higher thermodynamic performance.

Lee and Reistad conducted a thermodynamic analysis of aquifer recovery-based geothermal systems entailing power and heating as useful outputs. They Author: Osamah Siddiqui, Ibrahim Dincer. Australian Geothermal Energy Conference 1 Concept of an Integrated Workflow for Geothermal Exploration in Hot Sedimentary Aquifers J.

Florian Wellmann, Franklin G. Horowitz, Klaus Regenauer-Lieb Western Australian Geothermal Centre of Excellence, UWA-CSIRO-CURTIN A Dick Perry Avenue Kensington [email protected] The use of shallow geothermal energy (SGE) systems to acclimatize buildings has increased exponentially in the Netherlands and worldwide.

In certain areas, SGE systems are constructed in aquifers also used for drinking water supply raising the question of potential groundwater quality impact. Mapping the low enthalpy geothermal potential of shallow Quaternary aquifers in Finland Teppo Arola1*, Arola et al.

Geothermal EnergyPage 2 of 20 heating power that can be delivered to heat distribution systems of buildings from such aquifers by utilising heat pumps and (3) the surface area (m2) Cited by: Aquifer thermal energy storage is the storage and recovery of thermal energy in the subsurface.

ATES is applied to provide heating and cooling to buildings. Storage and recovery of thermal energy is achieved by extraction and injection of groundwater from aquifers using groundwater wells.

Systems commonly operate in a seasonal mode. The groundwater that is extracted in summer, is used for cooling by. gas-rich geothermal systems, as well as experimental studies, thermodynamic models for secondary minerals, equation-of-state formulations in the system NaCl-CO 2-H 2O and state-of-the-art electrolyte models, to gain insight into CO 2-induced fluid-rock interactions for temperatures in the range 10 - ºC, pressures from - 60 MPa, andCited by: 5.

TOWARDS A BEST PRACTICE METHODOLOGICAL APPRAISAL SYSTEM FOR DEEP GEOTHERMAL ENERGY SYSTEMS IN AQUIFERS W.A. van Leeuwen, C.N.P.J. Maaijwee and N.A. Buik Utrecht University / IF Technology Budapestlaan 4 CD Utrecht, the Netherlands e-mail: [email protected] ABSTRACT Pursuit and use of geothermal energy in theAuthor: W.

van Leeuwen, C. Maaijwee, N. Buik. A major cause of energy inefficiency is the generation of waste heat and the lack of waste heat utilisation, particularly low grade heat. The temperature range for low grade heat sources is typically between ambient temperature and K, and such low grade heat is especially abundant in industry as market potential for surplus/waste heat from industrial processes in the UK Cited by: Summary.

This book provides an introduction to the scientific fundamentals of groundwater and geothermal systems. In a simple and didactic manner the different water and energy problems existing in deformable porous rocks are explained as well as the corresponding theories and the mathematical and numerical tools that lead to modeling and solving them.

SGP-TR ANALYSIS OF HEAT TRANSFER AND ENERGY RECOVERY IN FRACTURED GEOTHERMAL RESERVOIRS by R. Iregui A. Hunsbedt P. Kruger A. London Stanford Geothermal Program Stanford University June Students understand economics of energy systems and basics of energy markets.

Students are able to develop and calculate example cases related to renewable energy and its integration into energy systems. TEXT BOOKS: &B.B.

Parulekar, Energy Technology Khanna Publishers. REFERENCE BOOKS: D.A. Reay, Waste heat recovery systems,Pergmon Press. Abstract. Simple models are discussed to evaluate reservoir lifetime and heat recovery factor in geothermal aquifers used for urban heating. By comparing various single well and doublet production schemes, it is shown that reinjection of heat depleted water greatly enhances heat recovery and reservoir lifetime, and can be optimized for maximum heat by: What is the Systems Analysis program.

The Systems Analysis program in the Geothermal Technologies Office focuses primarily on: Environmental issues Policy, regulatory, and financing Economic Analysis and validation Data and Tools that support geothermal exploration and development As a key part of the Systems Analysis portfolio, a two-year, comprehensive Vision Study for geothermal energy.

exchanger system. Several methods are available for a heat pump to use this groundwater. Extraction and disposal. This system is based on groundwater extraction from wells, recovery of thermal energy from it by means of the heat pump, and disposing of it into a sewer or surface water.

Many authorities, however do not grant licences for such. This chapter mainly presents a detailed theoretical study and experimental investigations of ground-source heat pump (GSHP) technology, concentrating on the ground-coupled heat pump (GCHP) systems.

A general introduction on the GSHPs and its development, and a description of the surface water (SWHP), ground-water (GWHP), and ground-coupled heat pumps are briefly by: 1.

An introduction to the exergy analysis of geothermal energy systems Ali Akbar Eftekhari June 2, Abstract In this short course, students will be introduced to the fundamentals of the exergy concept.

The terms e ciency and recovery factors will be de ned and discussed. Then, the .The book encounters basic knowledge about geothermal technology for the utilization of geothermal resources. The book helps to understand the basic geology needed for the utilization of geothermal energy, shows up the practice to make access to geothermal reservoirs by drilling and the engineering of the reservoir by enhancing methods/5(3).Being a heat source or sink, aquifers have been used to store large quantities of thermal energy to match cooling and heating supply and demand on both a short-term and long-term basis.

The current technical, economic, and environmental status of aquifer thermal energy storage (ATES) is promising. General information on the basic operation principles, design, and construction of ATES systems Cited by: